Messages in this thread | | | Date | Wed, 10 Jan 2007 15:12:02 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: [REGRESSION] 2.6.19/2.6.20-rc3 buffered write slowdown |
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On Thu, 11 Jan 2007, David Chinner wrote:
> Well, pdflush appears to be doing very little on both 2.6.18 and > 2.6.20-rc3. In both cases kswapd is consuming 10-20% of a CPU and > all of the pdflush threads combined (I've seen up to 7 active at > once) use maybe 1-2% of cpu time. This occurs regardless of the > dirty_ratio setting.
That sounds a bit much for kswapd. How many nodes? Any cpusets in use?
A upper maximum on the number of pdflush threads exists at 8. Are these multiple files or single file transfers?
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